This kind of new medicine is useful for cancer, however.it is notaccessibleor most people．题目和参考答案——青夏教育精英家教网—

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12．This kind of new medicine is useful for cancer； however，it is notaccessible（可行的）or most people．

分析这种新药物对治疗癌症有作用，但是它并不是对大多数人都可行．

解答答案是accessible．考查词组be accessible for 对…是可行的．句意是"这种新药物对治疗癌症有作用，但是它并不是对大多数人都可行．"所以用形容词accessible表示"可行的"．故答案是accessible．

点评本题考查翻译填空．首先要判断填写的单词及固定搭配，然后根据句意和相关语法填写正确的答案．

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2．A blue hole is a flooded sea cave with a hole that opens up at the land's surface．These cave systems form in carbonate rock，often on islands．Some blue holes have very special rock formations and water chemistry．Far below sea level，they contain some of the harshest environments on Earth，with no oxygen and no light．Yet these areas are filled with life forms that have adapted to the extreme conditions．
Information gathered from these blue holes is helping scientists to increase their understanding of biology，archaeology and geology．But exploring these blue hole environments brings danger as well as discovery．
Blue holes get their name from the color some have when seen from the air．The color is usually a reflection of the sky on the water．But not all of these cave systems have blue surfaces．Some contain dark or muddy water．
Blue holes are the result of erosion in which water breaks down rock．Rain falling thousands of years ago contained chemicals which slowly wore away at the limestone landmass．These holes were later filled with sea water as the sea level changed．The rising and falling of sea levels and the mixture of salt and fresh water further wore away at these cave formations．Blue holes are vertical caves．But they can also have horizontal cave formations that may be hundreds of meters long．
These flooded cave systems can be found in the ocean，or they can be found inland．Ocean caves are affected by tides，so they always have water movement．But blue holes on land are very still．They have several layers of water，chemicals，and bacteria．The top layer of fresh water comes from rainfall．This layer acts like a cap on top of the layered mixture，and keeps out oxygen from the atmosphere．The fresh water floats on a denser layer of saltwater．Underneath this is a layer of poisonous hydrogen sulfide，produced by bacteria living in the water．Underneath this layer is anoxic seawater--water that does not contain any oxygen．
Underwater caves are probably one of the least explored ecosystems on the planet．One reason blue holes have not been fully explored is that they can be extremely dangerous．There are many safety rules that divers must follow to help ensure their survival．
First，divers must have training and experience to swim in these caves．Those who explore a cave for the first time must establish a thin rope called a guideline．This line helps them to safely enter and bring more than one set of breathing equipment in case one device fails．Meanwhile，they must pay careful attention to their air supply．The rule is to use a third of their air to enter the cave，a third to exit，and a third for emergencies．
    For most explorers，though，the possibility of discovery in these cave environments makes the experience worth the risk．You can jump into what looks like an insignificant little hole in the ground，and come out with information that's of value to many different disciplines，Scientists are interested in these caves because oxygen-free conditions there are similar to those on Earth long ago，before oxygen existed on our planet．，as well as similar to space．
50．According to the Passage，blue holesB．
A．are now a popular choice for tourists
B．are flooded caves found mostly on islands
C．have appeared as rocks pile up year by year
D．can give off bright blue light deep in the caves
51．It can be inferred front the passage thatD．
A．quantities of advanced life forms exist in blue boles
B．blue holes are not fully explored due to their low value
C．blue holes are vertical caves because of strong currents
D．the chemicals in the rain lead to the formation of blue caves
52．The fifth paragraph mainly talks aboutA．
A．two different types of blue holes
B．how a blue hole comes into being
C．why scientists are interested in blue holes
D．rules for divers exploring blue holes
53．When exploring blue holes，divers mustD．
A．have a thin rope as a guideline anytime
B．wear glasses in case of bright blue light
C．swim as quickly as possible to save time
D．learn to make good use of their air supply
54．The exploration of blue holes can help usB．
A．discover moue energy resources
B．understand the origin of life on Farth
C．learn about the movements of seawater
D．get ready for the exploration of the ocean．

3．No one knows for sure when a fire will happen，so it is （56）extremely （extreme） necessary to make preparations before a fire starts．Check the fire escape equipment in advance and make sure that you can find （57）it in the dark when lights have failed．Find out （58）Wherethe nearest fire extinguisher（灭火器） is and read the instructions to learn how （59）to use（ use） it．
Don't lose your head when a fire breaks out．First，telephone the fire department immediately when （60）the fire just gets started．Take care not to be overcome by smoke，（61）which can kill you quickly．Cover your mouth （62）with a wet towel or cloth，and avoid getting into the smoke．Don't get in an elevator，as you may get trapped if the electricity （63）fails （fail）．If you can not get away （64）by yourself，it is of great importance to hang something out of the window to attract attention as a sign of asking for help．
In short，if you make preparations before hand and take precautions（预防措施） during the fire，chances are that （65）youwill survive in case of a fire if it really breaks out some day．

20．Shut the window，_________ it'll get too cold in here．（　　）

7．The escaped prisoner wasdragged （拉） out of the cave．

17．Her shoes ______ her dress； they look very well together．（　　）

4．I'd like you to____ my name from your list．I don't want to be involved in the matter．（　　）

1．假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文．文中共有10处语言错误，每句中最多有两处．每处错误仅涉及一个单词的增加、删除或修改．
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词．
删除：把多余的词用斜线（\）划掉．
修改：在错的词下划一横线，并在该词下面写出修改后的词．
注意：1．每处错误及其修改均仅限一词；
2．只允许修改10处，多者（从第11处起）不计分
A boy was cleaning shoes in the street said to a young man passing by，"Let me to clean your boots．"The young man said，"No．""It will spend you a penny，sir．"said the boy and the young man again refused．Then the boy told him that he would clean his boots to nothing．The man agreed this，and soon one boot was shining brightly．Then he put his another boot on the box but the boy refused to clean it if he was paid two pence for his work．The young man refused to pay anything and go away．But the shining boot made the dirty one looks so bad that he had to turn back，gave the boy the two pence and asked him to clean it．

2．The pale（苍白的）face suggested that shewas（be） ill．

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